When you smell bread baking, the bread odor particles

• A. stay in the air only.
• B. are in the nose.
• C. are sensed by gustation.
• D. are beginning to die.

Answer: (B)

Verified step by step guidance

1. Understand the concept of olfaction, which is the sense of smell. It involves detecting and identifying odor molecules in the air.
2. Recognize that when you smell something, such as bread baking, odor molecules are released into the air and enter the nose.
3. Learn that inside the nose, these odor molecules bind to olfactory receptors located in the olfactory epithelium.
4. Note that the olfactory receptors send signals to the brain, specifically the olfactory bulb, where the perception of smell is processed.
5. Differentiate between olfaction and gustation (sense of taste), as they are separate sensory systems, although they often work together to create the perception of flavor.